Module: Numo::Linalg::Loader

Defined in:
lib/numo/linalg/loader.rb

Constant Summary

@@libs = 
nil

Class Method Summary collapse

Class Method Details

.libs ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 11

def libs
  @@libs
end

.load_atlas(path = nil, exc: true) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 83

def load_atlas(path=nil,exc:true)
  a = case path
      when String; [path]
      when Array ;  path
      when NilClass; [ATLAS_LIBPATH,""].compact
      else raise ArgumentError,"invalid path"
      end
  a.each do |d|
    %w[libtatlas.so libatlas.so libsatlas.so].each do |f|
      f = File.join(d,f) if !d.empty?
      begin
        Fiddle.dlopen(f)
        Blas.dlopen(f)
        l = LAPACK_LIBPATH
        e = "liblapacke.so"
        e = File.join(l,e) if l && !l.empty?
        Lapack.dlopen(e)
        @@libs = [ f, e ]
        if $DEBUG
          $stderr.puts "Numo::Linalg: use #{f}"
        end
        return true
      rescue
      end
    end
  end
  if exc
    raise RuntimeError, "cannot find ATLAS library"
  end
  false
end

.load_lapack(path = nil, exc: true) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 115

def load_lapack(path=nil,exc:true)
  a = case path
      when String; [[path,path]]
      when Array ;  [path]
      when NilClass
        b = BLAS_LIBPATH || LAPACK_LIBPATH
        l = LAPACK_LIBPATH || BLAS_LIBPATH
        (b ? [[b,l]] : []) + ["",""]
      else raise ArgumentError,"invalid path"
      end
  a.each do |arg|
    b,l = *arg
    if b.empty?
      f_blas = "libblas.so"
      f_cblas = "libcblas.so"
      f_lapack = "liblapack.so"
      f_lapacke = "liblapacke.so"
    else
      f_blas = File.join(b,"libblas.so")
      f_cblas = File.join(b,"libcblas.so")
      f_lapack = File.join(l,"liblapack.so")
      f_lapacke = File.join(l,"liblapacke.so")
    end
    begin
      Fiddle.dlopen(f_blas)
      Fiddle.dlopen(f_lapack)
      Blas.dlopen(f_cblas)
      Lapack.dlopen(f_lapacke)
      @@libs = [ f_blas, f_lapack, f_cblas, f_lapacke ]
      if $DEBUG
        $stderr.puts "Numo::Linalg: use #{f_blas} and #{f_lapack}"
      end
      return true
    rescue
    end
  end
  if exc
    raise RuntimeError, "cannot find BLAS/LAPABK library"
  end
  false
end

.load_library ⇒ Object

Raises:

  • (RuntimeError) 


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# File 'lib/numo/linalg/loader.rb', line 157

def load_library
  case BACKEND
  when /mkl/i         ; return if load_mkl(exc:false)
  when /^openblas/i   ; return if load_openblas(exc:false)
  when /^atlas/i      ; return if load_atlas(exc:false)
  when /lapack|blas/i ; return if load_lapack(exc:false)
  else
    return if load_mkl(exc:false)
    return if load_openblas(exc:false)
    return if load_atlas(exc:false)
    return if load_lapack(exc:false)
  end
  raise RuntimeError, "cannot find backend library for Numo::Linalg"
end

.load_mkl(path = nil, exc: true) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 15

def load_mkl(path=nil,exc:true)
  a = case path
      when String; [path]
      when Array ;  path
      when NilClass; [MKL_LIBPATH,""].compact
      else raise ArgumentError,"invalid path"
      end
  a.each do |d|
    if d.empty?
      f_iomp5 = "libiomp5.so"
      f_mkl_core = "libmkl_core.so"
      f_intel_thread = "libmkl_intel_thread.so"
      f_intel_lp64 = "libmkl_intel_lp64.so"
    else
      e = d.sub(/\/mkl\//, "/")
      f_iomp5 = File.join(e,"libiomp5.so")
      f_mkl_core = File.join(d,"libmkl_core.so")
      f_intel_thread = File.join(d,"libmkl_intel_thread.so")
      f_intel_lp64 = File.join(d,"libmkl_intel_lp64.so")
    end
    begin
      Fiddle.dlopen(f_iomp5)
      Fiddle.dlopen(f_mkl_core)
      Fiddle.dlopen(f_intel_thread)
      Blas.dlopen(f_intel_lp64)
      Lapack.dlopen(f_intel_lp64)
      @@libs = [ f_iomp5, f_mkl_core, f_intel_thread, f_intel_lp64 ]
      if $DEBUG
        $stderr.puts "Numo::Linalg: use #{f_intel_lp64}"
      end
      return true
    rescue
    end
  end
  if exc
    raise RuntimeError, "cannot find MKL library"
  end
  false
end

.load_openblas(path = nil, exc: true) ⇒ Object 



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# File 'lib/numo/linalg/loader.rb', line 55

def load_openblas(path=nil,exc:true)
  a = case path
      when String; [path]
      when Array ;  path
      when NilClass; [OPENBLAS_LIBPATH,""].compact
      else raise ArgumentError,"invalid path"
      end
  a.each do |d|
    %w[libopenblaso.so libopenblasp.so libopenblas.so].each do |f|
      f = File.join(d,f) if !d.empty?
      begin
        Blas.dlopen(f)
        Lapack.dlopen(f)
        @@libs = [ f ]
        if $DEBUG
          $stderr.puts "Numo::Linalg: use #{f}"
        end
        return true
      rescue
      end
    end
  end
  if exc
    raise RuntimeError, "cannot find OpenBLAS library"
  end
  false
end